期刊
JOURNAL OF INSECT PHYSIOLOGY
卷 54, 期 6, 页码 909-915出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jinsphys.2008.03.012
关键词
juvenile hormone; ecdysteroid; immune; plasmatocyte; cytokine; PKC; plasmatocyte-spreading peptide
资金
- National Research Foundation of Korea [핵06B2511] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Juvenile hormone (JH) acts on membrane of follicle cells to induce ovarian patency for vitellogenesis, though it regulates various other physiological processes via putative intracellular receptors. This study suggests another JH membrane action by analyzing in vitro hemocyte behavior. In response to nonself, both granular cells and plasmatocytes of Spodoptera exigua can exhibit cell shape changes through spreading behaviors. Plasmatocytes were separated from total S. exigua hemocytes by Percoll gradient and exposed in vitro to an insect cytokine, plasmatocyte-spreading peptide (PSP), identified from Pseudoplusia includens. In response, the purified plasmatocytes spread in a dose-dependent manner from picomolar to micromolar concentrations. Interestingly, the PSP responses of plasmatocytes in S. exigua varied among different larval ages during fifth instar (approximate to 5 days at 25 degrees C) in a sensitivity order of late (5 days old)
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